Bicycle-brake.



F. 1 REID. BICYCLE BRAKE.

APPLICATION FILED MAR. 15, 1913.

Patented Aug. 11, 1914.

UNITED STATES PATENT OFFICE.

FREDRICK D. REID, or LAUREL, MISSISSIPPI.

BICYCLE-BRAKE.

mom-is.

To all whom it may concern Be it known that I, FREDRIOK D. REID, acitizen of the United States, residing at Laurel, in the county ofJones, State of Mississippi, have invented certain new and usefulImprovements in Bicycle-Brakes; and I do hereby declare the following tobe a full, clear, and exact description of the in-v With the above andother objects in view,

the invention resides more particularly in the peculiar combinations andarrangements of parts, which will be partly illustrated in theaccompanying drawings and described in the specification, although theinvention is protected for all desirable changes and uses within thescope of the invention as claimed.

In the drawings: Figure 1 is a side elevation of my improved bicyclewith the braking mechanism in inoperative position. Fig. 2 is a top planview thereof. Fig. 3 is a vertical sectional view taken on the line 3-3of Fig. 1, and looking in the direction of the arrows. Fig. 4 is anelevation of a fragmentary portion of the device looking to ward theopposite side from that shown in Fig. 1 and with the rear drive wheelremoved.

Tn illustrating the preferred embodiment of the invention, there isshown a bicycle having a frame 10 provided with the usual front steeringwheel 11 and the rear drive wheel 12. The triangular portion of theframe 10 carries a cross brace 13 which connects the inclined portionsof the frame and said cross brace 13 is made rigid by a forwardlyinclined brace 14. The usual crank hanger carries a crank shaft 15having the usual propelling pedals 16 and said shaft carries a groovedpulley or drive wheel 17 at one side of the frame.

The cross brace 13 has a bearing portion in which is rotatably mounted ashaft 18 on one end of which a grooved pulley or wheel Specification ofLetters Patent.

Application filed March 15, 1913.

Patented Aug. 11, 1914. Serial No. 754,481.

19 is keyed, so that the shaft may be driven by means of an endlessdrive member or belt 20 engaged around the pulleys 17 and 19. The shaft18 carries a relatively large grooved pulley or wheel 21 on its oppositeend, being substantially the same diameter as the pulley 17 andconsiderably larger than the pulley 19, so that rotation imparted to theshaft 18 may be transferred from the pulley 21 to the rear drive orpropelling wheel 12 through the medium of a grooved pulley 22 keyed tothe rear axle 23, and an endless drive member or belt 2 1 engaged aroundthe pulleys 21 and 22 respectively. By this means the rear wheel may becaused to revolve at a high speed of rotation, as the gear isconsiderably multiplied and the feet will therefore travel at a slowrate.

The improved brake constituting a part of the invention embodies anangular lever 25 pivoted near its lower end to the cross bar 26 of theframe and having its opposite extremity connected by a rod 27 to anangle plate 28 pivoted on the frame and constituting a rocking lever.The plate is pivoted near its lower corner and the rod 27 is pivoted toone of the upper corners of the plate. The rod 29 is pivoted to theremaining corner and extended downwardly in front of the rear fork, andhas its lower end provided with a forked portion or bifurcation 30 whichstraddles the lower rear fork of the frame. This bifurcation or forkportion operates over the flattened or drop forged portion of the rearforks at one side and is held from longitudinal shifting by a shoulder31 produced by flattening said part at an abrupt angle. The inner leg ofthe bifurcation or forked portion 30 of the rod 29 is considerablylonger than the outer portion and has connected thereto as by means of apivot 32, a triangular brake shoe 33, the base of which is formedconcavely arcuate as shown at 34, producing a 0011- caved engaging face.A brake disk 35 is fixed to the rear drive wheel for engagement by theshoe 33 and when the parts are in normal position the lever 25 is raisedso that its gripping portion .is substantially horizontally extended andthe rods 27 and 29 are shifted rearwardly and downwardly respectively,so that the shoe is disengaged from the brake disk. However, when thelever 25 is moved downwardly, said rods are oppositely shifted and thebrake shoe drawn in contact with the periphery of the disk so that thefrictional contact of said parts will bring the wheel to astop. Byreason of the pivotal connection of the brake shoe with its operatingrod, a positive seating of the shoe against the disk is provided for anda shoe can thus be made considerably larger so as to cover a greaterarea of the disk than if it were formed stationary or rigid therewith.

I claim: 7

The combination with a bicycle frame having a front steering wheel and arear drive Wheel and means for driving said wheels; of a brake mechanismfor the wheel, said mechanism embodying a disk fixed to the rear Wheel,a portion of the frame having a flattened portion producing a shoulder,a rod having a bifurcated portion slidable on said flattened portionadjacent the rear portion of the frame, a shoe pivoted to one legportion of said bifurcation and having a concaved face engaging thedisk, a triangular plate pivoted on the horizontal portion of the frameand pivotally connected to said rod, a lever pivoted to said horizontalportion of the frame and having a gripping portion disposed insubstantial horizontal position and a rod connecting said lever and thetriangular plate.

In testimony whereof, I aflix my signature, in the presence of twowitnesses.

FREDRICK D. REID.

Witnesses B. F. CARTER, J. A. BOYD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. G.

